Type-writing machine.



F. YOUNG. TYPE WRITING MACHINE. APPLICATION FILED JAN.25. 1909.

Patented May 18, 1909.

fnbenion' 03M 00 By 215 14 1/023 14 22 14 ass 68" UNITED STATES.

FRANK A. YOUNG, or NEW YORK, N. Y.,' ASSIGNOR 'lO UNDERWOOD TYPEWRITER COMPANY,

PATENT OFFICE.

OF NEW YORK, N. YQA CORPORATION OF NEW JERSEY.

TYPE-WRITING MACHINE.

Specification of Letters Eatent.

Patented May s, 1909..

Application filed January 25, 1909. Serial No. 4;74,080.

Tacit-whom it may concern:

Be it known that I, FRANK A. YOUNG, a citizen of the United States, residing in New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Type-Writing Machines, of whlch the iollowing 1s a specihcation.

This invention relates to the line-spacing devices of typewriting machines, and particularly to means for facilitating the writing of exponents, fractions, etc.; although the invention is not limited to this particular use ' The principal object of the invention is to provide simpleand effective means, which 'Accordingto the preferred form of the iiivention, there is provided, in addition to the usual line-space wheel, which is commonly formed with say thirty teeth or notches, to enable thirty uniformly spaced lines to be written ateach revolution of the platen, an auxiliary line space wheel similar to the main wheel, but having its teeth in staggering or alternative relation to-the teeth in the main wheel. Each wheel is provided with a detent, so that the wheels are alternately eii'ective to check or hold the platen; and

- hence the latter can be detained in any one of sixty different rotative positions.

laten is of such size that one-sixtieth of its periphery is less than the height of a 1 nents, fractions, etc.

g u'jsual manner, so that the writing proceeds 2;; down the page as ousto1m1.rv;.but at any time the operator may grasp the platen knob and turn the platen a half space up or down, and one of the detents will hold it there during the writing of ,one or more characters; whereupon the operator may The again grasp the platen knob and return the platen to proper position to continue the main line of ,writing. In the accompanying drawings, Figure 1 is a perspective View of a platen and platen I frame of an Underwood front strike machine, provided with the present improvements. 2 is a perspective view of a double releasing lever. Flg. 3 is a part sectional end view of the line-spacing mechanism, showing the same set or ordinary single line-spacing. Fig. 4 is a similar view to Fig. 3, but diagrammatically showing the parts set for ordinary triple line spacing.

leased from the line-space wheels, to permit the platen to be turned independently irregular line-spacing. Fig. 5 is a plan of. the mechanism. Fig. 6 is a fragmentary elevation on a larger scale, to illustrate the alternative action of the spring-pressed detent rolls. I

A platen l is fixed to an axle 2, whereby comprising a pair of ends 3 and a connecting paper shelf 4. Fixed upon the axle 2 of the end 3 is a main or ordinary notched or toothed line-space wheel 5, which is engaged by a roll 6 pivoted upon the lower end of an arm 7, the latter pivoted at its upper end on a stud 8 pro'ecting outwardly from the platen frame en A s ring 9 bearing upon the arm 7 causes the r0 1 6 to press into the notches of the Wheel 5, said notches being formed at the'usual'linaspace intervals. i The platen maybe rotated a distance to equal either one, two or three of the'notches in the wheel 5 by means of the usual lever 10 mounted pjon a carriage, (not shown), and havinga'n In 11 tofpi ess rearwardly a slide 12 mounted'l-in th'e' platen frame end and having a returhingspring 13. Pivoted to this slide-at 14 is a pawl 15 to engage the teeth of the wheel 5 and advance the platen.

The extent to which the platen is advanced by the lever 10 is determined by a regulator 16 mounted to turn about the platen axis and connected to a slide 117, which has three At .this view the detents are shown as re;

it is revolubly mountedin a platen frame.

p e n's '18.. any on f i h ma or nose '21 When the -sli e12 is returned forwardly by gage a spring-check 19, to hold said slide thespring 13, the nose 21 rides up over the lip 20 and liftsthe pawl 15 out of engagement with the wheel 5. The position of the nose 20 determines the point at which the pawl 15 shall be again let intoengagement with the wheel durin the advance stroke of the slide 12, and ence determines the number of lines that the platen shall be spaced, whether one, two or three of the notches in the wheel 5.- As so far described, the parts are in common use, on said Underwood typewriting machine; with the exce tion that the stud 8 is longer than the ordinary stud. Also fixed upon the, platen axle 2, outside of the wheel 5, is an auxiliary notched or toothed wheel 22, having the same number of uniformly spaced teeth as the wheel 5. A detent roll 23, to engage wheel 22, is carried upon the lower end of an arm 24 pivoted upon the same stud 8 as the arm 7 and having a spring 25 similar to the spring 9 to ress the roll 23 into the notches in the whee 22.

Preferably the rolls 6 and 23 are in line, that is, equally distant from the stud 8, and

' the wheels '5 and.22 are set so that their teeth alternate, as seen best at Fig. 6. In consequence, when detent roll 23 presses into a notch in the wheel 22, the other detent 6 rests upon the point of a tooth in the wheel 5, as at Fig. 6. If the platen benow advanced a distance e ual to half of an ordinary line space, the etent wheel 6 will sink into the adjoining notch in the wheel 5,

while the detent roll 23 will rise to bear against the point of the'ad'acent tooth on the Wheel 22. Thus said etents are constantly effective in alternation to hold the platen steady, at intervals equal to less than when it is desired to write characters either above or below the line of writing, the usual platen knob 27 is turned to rotate the platen either forwardly or backwardlyhalf .a line space to bring the detent 23 into the Fig. 6 position. I

To release the platen from the control of the detents, a handle 28'is pulled upwardly from the Fig. 1 to the Fig. 4 position; said handle connecthd to a air of levers 29, 30

rigidly connected toget er'by a union 31,

andha'vin .similar cams 32, to en age pins 33. on the etent arms 7 and24, to throw the detents simultaneously backward away from the notcher'i wheels, as'at'Fig. 4, and lock them there; thus leaving theplaten free to be turned to any extent by means of the knob 27. .Upondepressing the handle 28, J

of the pitch of the teeth of, the usual lines acing wheel, or in other words, to a frac tion of the shortestintervals through which the platen can be turned by rocato'ry line-spacing devices.

Certain features of the invention. may be the usual recipused for other purposes;'and portions of the iml irovements may be used Without others. aving thus described my invention, I claim: e

1. In a typewritin machine, the combination with a platen, 0 two notched or toothed members connected thereto,- and spring-.

pressed check or detent rolls, one'for each notched member; the notches in one member alternating with those in the other, and the detent rolls positioned to bring. one on the point of a tooth whenthe other is seated in a notch.

2.. In atypewritin machine,'the combination with a platen, 0 two notched or toothed members connected thereto, spring-pressed check or detent rolls, one for each notched member; the notches in one member altere nating with those in the other, and the de tent rolls positioned to bn'ng'one on the point of a tooth when the other is seated in a notch, and a line-spacing mechanism connected to one of said notched members.-

3.' In a typewritin 'machine, the combination with a revolu l'e platen, of yielding means for constantly arresting and holding the platen at minor re lar rotative inter vals, each less than the eight of a typewritten letter, and a reciprocatory awl and driver cooperatin with means to e ect regular line-spacin oi the platen through major intervals equa to at least two of said minor intervals. t

4. In a typewriting machine, the combination with a revolu 1e platen, of yielding means for constantly arresting and holding the platen at minor r'e ular rotative inter- 'vals,'each less than the eight of a typewritten letter, and a reciprocato'ry awl and driver cooperating with means to e ect regu lar line-spacing intervals equa to either two, four or six of said minor Intervals.

5. The combination with a revoluble platen, of a toothed line-space wheel conof the platen through major space wheel, apaw nected thereto, a spring detent for said linespace wheel, a pawl to drive said line-space wheel, an actuator for said pawl, and an auX iliary line-space wheel having the same number of teeth as the main line-space wheel and provided with-a spring detent or roll; said having a' staggering relation to each other,

and means to lock both detents out of use to permit irregular line-spacing of the platen.

7. In a typewrit-ing machine, the combination with a platen, of two notched or toothed members connected thereto, spring-pressed check or detent rolls, one for each notched member; the notches in one member alternating with those-in the other, and the detent rolls positioned to bring one on the point of a tooth when the other is seated in a notch, and means to release both notched members concomitantly from the control of the detent rolls and to maintain. them mechanically in released condition, to permit irregular linespacing of the latch.

8. The com ination with a revoluble platen, of two lme-space wheels connected thereto and having a stag ering relation to each other, detents for the 'ne-spacewheels, and means to withdraw both detents simul- ;taneously and lock them out of use topermit lthe platen to be rotated throughirregular intervals.

i 9. The combination with a revoluble platen, of a pair of similarly toothed linespace wheels connected thereto, yielding means constantly engaging both of saidllinespace wheels, to check or hold the platen, the

teeth in said line-space wheels having a staggering relation, and a reciprocatory linespacing mechanism enga ing only one of said wheels, to advance the p aten through intervalsequal to either one or more full teeth of the last-mentioned wheel.

10. In a typewriting machine, the combination of a revoluble platen having an axle, two notched line-space wheels fixed to said axle and platen, a stud or pivot on the platen frame, two spring-pressed arms pivoted on said stud and having checks to engage the li'icespace wheels, the teeth in one wheel havmg a staggering relation to those in the other wheel.

11. In a typewriting machine, the combination of a revoluble platen having an aXle, two notched line-space wheels fixed to said axle and platen, a stud or ivot on the platen frame, two spring-pressed arms pivoted on said stud and having checks to engage the line-space wheels, the teeth in one wheelhaving a staggering relation to those in the" other wheel, and a lever hung on the platen axle and having cams to engage said spring-arms to clear them from the wheels and hold them released.

12. The combination with a revoluble platen, of a toothed line-spacewheel connect ed thereto, a spring detent for said line-space wheel, a pawl to drive said line-space wheel, an actuator for said pawl, an auxiliar linespace wheel having. the same num er of teeth as the main line-space wheel and provided with a spring detent or roll; said wheels having a staggering relation to each other, and a releasing device having cams, one for each of said detents, to move and lock the same away from the line-space wheels.

13. In a typewriting machine, the combination with a platen, of two spring-pressed checks or detent rolls, and notched or toothed means connected to the platen to cooperate.

with said checks in alternation, the checks constructed so that when one seats a notch the other presses idly upon the point of a tooth.

14. In a typewritin machine, the combination with a revolub e laten, of main and auxiliary notched or toot ed wheels connected thereto, and spring-pressed detents to engage said wheels to cooperate therewith in alternation to arrest the platenat intervals equal in number to the aggregate of the teeth in the wheels the detents constructed idly upon the point of a tooth.

15. In a typewriting machine, the combination with a platen and a pair of notched or toothed mem ers rigidly connected thereto, of a pair of detent members to engage said toothed members to arrest and hold the so that when one is in a notch, the other restsf platen; the members in one of said pairs having a staggering relation to each other.

16. In a typewriting machine, the combination with a laten and a pair of notched or toothed memliers rigidly connected thereto, of a pair of detent members toen ae said toothed members to arrest and o d the platen; the members in one of said pairs having a staggering relation to each other, and means to release said detent members, and

lock them in released positions.

17. In a typewriting machine, the combination with a platen, of two spring-pressed members, and lock them in released 'positions. Y v 18. In a typewriting machine, thecombi nation with a platen, of two sprlng-pressed checks or detent rolls, notched or toothed thecks or detent rolls, notch-eCi-or toothed l meansto effect linespeeing movementsiof. means connected to the plateh to cooperate the platen'topn e'x tenteqpal to 011601: more withgaidehecksfi 1'-I' L' 8i1ei nat/ion, the checks full teeth. constructed so that jwhen fone seats a v A. YOUNG? 5 hot Ch the other pl esses. idly upon the"poi nt Witnesses; r

of a, tooth, and a, reciprocatory line-spabing I JOHN O. SEI ERT', meohamsm to engage said notched or toothed K". FRANKF'OBT'. 

